<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2016/3/2 0002
 * Time: 下午 3:20
 */

$gmp = gmp_add('4412113211132131321','4156412311313131');
#echo gmp_strval($gmp);

$str = "1789781";
#echo $str{1};
echo ord('0');
echo "||";
echo ord('9');
echo "||";
echo ord('a');
echo "||";
echo ord("z");